Immune Responses to Haemorrhagic Septicaemia (HS) Vaccination in Trypanosoma Evansi Infected Buffalo-calves

Overview

Journal Trop Anim Health Prod

Publisher Springer

Specialties Tropical Medicine
Veterinary Medicine

Date 2009 Sep 29

PMID 19784863

Citations 14

Authors

Lachhman D Singla

Prayag D Juyal

Narinder S Sharma

Affiliations

Soon will be listed here.

Abstract

To assess the immunosuppressive effect of Trypanosoma evansi infection in buffalo-calves on immune responses to heterologous antigen, the study was planned to examine the responses of haemorrhagic septicaemia vaccination in simultaneously and previously (80 days before vaccination) T. evansi-infected buffalo-calves. Eight buffalo-calves were divided into three groups. Buffalo-calves of group A (n = 3) were previously (80 days before primary vaccination with haemorrhagic septicaemia [HS] vaccine) infected with T. evansi (1 x 10(7) tryps.calf(-1); sc) and that of group B (n = 3) were infected with T. evansi (1 x 10(7) tryps.calf(-1); sc) on the day of primary vaccination with HS vaccine. Two healthy uninfected control calves given only HS vaccine were kept in group C. All the buffalo-calves were given a booster dose of vaccine 21 days post-primary vaccination (PPV). Twenty eight days PPV, animals of group A were given trypanocidal quinapyramine prosalt at 6.66 mg kg(-1). Immunosuppressive effect of T. evansi infection was evident from day 7 PPV with HS vaccine. The effect was more pronounced in previously T. evansi-infected buffalo-calves as compared with simultaneously infected buffalo-calves. Group A buffalo-calves appeared to have recovered from the immunosuppressive effect after 28 days post-trypanocidal treatment as observed by humoral and cell-mediated immune responses. Immunosuppressive effect to HS vaccination was observed in T. evansi-infected buffalo-calves, and trypanocidal therapy enabled the calves to mount the responses similar to uninfected controls.

Citing Articles

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Single-cell transcriptome profiling and the use of AID deficient mice reveal that B cell activation combined with antibody class switch recombination and somatic hypermutation do not benefit the control of experimental trypanosomosis.

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Magez S, Pinto Torres J, Obishakin E, Radwanska M Front Immunol. 2020; 11:382.

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